Mathematics
05.09.2020 17:31
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Fast i am panicking time remaining on test: 31 minutes bob and james are finishing
Fast i am panicking
time remaining on test: 31 minutes
bob and james are finishing the roof of a house. working alone, bob can shingle the roof in 14 hours. james can shingle the same roof in 18 hours. how long will it take them working together to shingle the roof? round your answer to the nearest hundredth if necessary. show work.
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time remaining on test: 31 minutes
bob and james are finishing the roof of a house. working alone, bob can shingle the roof in 14 hours. james can shingle the same roof in 18 hours. how long will it take them working together to shingle the roof? round your answer to the nearest hundredth if necessary. show work.
marianesabrinap20
4,9(8 marks)
If Bob can do it alone in 14 hours then he can do 1/14 of the job each hour
James can do 1/18 of the job each hour.
let x = time it takes them working together
then
x/14 + x/18 = 1 (this statement says that the number of hours x times Bob's rate and James's rate added will give 1 or the full job
18x + 14x = 252
32x = 252
x = 7.875 hours (time to finish when working together
James can do 1/18 of the job each hour.
let x = time it takes them working together
then
x/14 + x/18 = 1 (this statement says that the number of hours x times Bob's rate and James's rate added will give 1 or the full job
18x + 14x = 252
32x = 252
x = 7.875 hours (time to finish when working together
saltyimps3
4,7(26 marks)
im my opionion i would say 7.875 or 7.9 hours ย with thme working together combined thats my estimate dont hate me if its wrong ;|
Step-by-step explanation:
amulets7017
4,5(69 marks)
The answer to your question is
104 and 52
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